Projecting apparatus.



H. P. PATTON.

PROJBGTING APPARATUS.

APPLIGATIONYHLED JUNE 21, 1909,

H. F. PATTON.

PROJEGTING APIARATUS.

APPLIGATION FILED JUNE 21, 1909.

Mwww, 1 Patented Mar. 23, 1915.

4 SHEETS-snm z.

W/hzess es:

H. F. PATTON.

PROJBGTING APPARATUS.

APPLICATION ILED JUNE 21, 1909.

Patented Mm'. 23, 1915.

4 SHEETS-SHEET 3.

"'HE NORRIS PETERS CO.. PljlT-LITHO.. WASHINGTON, D. C.

H. PATTON.

PROJEGTING APPARATUS.

APPLICATION FILED JUNE 21, 1909.

Patented Mar. 23, 1915.

4 SHEETS-SHEET 4.

.550w/Maz HERBERT r. Perron, or CLEVELAND, oHio.

PROJECTNG' APPARATUS.

Application filed .Tune 21, 1909.

To all 'whom- 't may concern Be it lrnown that l, HERBERT F. PATTON, a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, and State of Ohio, have invented a new and useful improvement in Projecting Apparatus, of which the following is a specification, the principle of the invention being herein explained and the best mode in which l have contemplated applying that principle, so as to distinguish it from other inventions.

rlhe present invention, relating as indicated to projecting apparatus, has more particular regard to magic lanterns and the like, wherein an arc lamp is used as the source of the illumination by which the picture is projected onto the screen. While any of the usual forms of are lamps employed in connection with projecting apparatus may be utilized with the apparatus herein shown and described, such present apparatus is designed in certain of its details for use with an improved construction of are lamp forming the subject matter of U. S. Letters Patent No. 904,540, granted to me November 2li, 1908.

The object of the present invention, then, aside from the provision of a structure adapted for use with such particular arc lamp, is the construction of the lantern hood oribody whereby free radiation of heat therethrough is permitted, while still effectively cloaking the light; also the lprovision of means for readily adjusting the apparatus in order to set the image on the screen, of an improved condenser holder, and of means for readily shifting from one objective to another.

To the accomplishment of these and related ends, said invention consists of the means hereinafter fully described and particularly pointed out in the claims.

The annexed drawings and the following description set forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

ln said annexed drawing :MFigure l is a plan view of a lantern embodying my several improvements; Fig. 2, is a side elevational view of the same the lens holder being shown in open position; while Figs. 3 and 4lV are respectively, a front and rear elevation Specification of Letters Patent.

rammen irai. as, mit.

Serial No. 503,306.

thereof; Fig. 5 is a plan view of the lamp support; Fig. 6 is a transverse sectional View thereof on the line 6-6, Fig. 5; Fig. 7 a sectional view showing the detailed construction of the lantern hood or body; Fig. 8 a similar sectional view of the plate that carries the objective; and Fig. 9 is a sectional view of an improved construction of carbon holder employed in connection with the lamp.

The base of the apparatus comprises a rectangular frame made up of two side members a in the form of rods disposed parallel to each other, and suitably connected at either end. Such connection at the rear end takes the form of a casting a', shaped to provide a centrally disposed foot for the base, while at the forward end, the two side members are joined by a vertically disposed frame A to the rear side of which is attached one end of the bellows B. The other end of such bellows is attached to an intermediate frame A2 slidably mounted on the side members a of the base, and adapted to receive the slide holder C, such holder being removably secured in place by means of set screws a2 from above. Mounted in the vertical frame A at the forward end of the base, so as to be both vertically and rotatably adj ustable therein, are two rods a3, one on each side, such rods bearing at their lower ends foot-members at laterally displaced therefrom, so as to be adapted, in one axial position of the rods, to project to-either side of the apparatus, while in another position they lie beneath the base out of the way, thus facilitating the packing of the apparatus. Such rods are preferably incased in tubes a5 that form in effect, a part of the frame, and in addition serve as pintles about which two plates A3, to which the objectives D, where more than one of the latter are employed, are designed to be pivotally secured. Other rods a9 vertically adjustable, one on each side of intermediate rods a, provide auxiliary supporting means for the base.

In Figs. l and 2 only one such pivotal plate A3 is illustrated, and this is all that will be supplied with the apparatus when designed for use with but a single objective; where, on the other hand, it is desired to use interchangeably an ordinary objective and (for example) one for microscopic Work,

Y fore.v

two such plates A3 are provided, one pivoted on each side of frame AJ. The one not in use, will then be swung aside as shown in Fig. 3, the other fitting in the front of the framevA with sufiicient tightness to be held in closed position, and yet permit it, when desired, to be readily turned outwardly and the other objective swung into place, after the fashion of a gate. To secure the objectives to such swinging platesor gates, a supplementary ring d is provided in the latter, which ring is frictionally held in place by a plurality of set screws cl carried thereby, as illustrated in Fig. 8. The objective is then.screwedintoisuch ring, instead of directly.into the vsupporting plate as hereto- Inasmuch as a. definite position is always occupied by the objective with respect tol the ring orotherrnember into which it is thus' screwed, owing to the termination of the threads of the screw, it has notheretov fore been possible to rotate the objective in order to. bring the adjusting screw Z2.tl1ere on intorconvenient position for use by the operator, irrespective. of which side of the machine he stands. Byniounting such objectivehowever, upon supplementary. ring d, which isffreely` rotatable irrespective oi' the threading of. the -objective, such adjusting screw Z2 can obviouslybe positioned as most convenient to permit :operation from either side oftheapparatus. It will yfurthermore be seen that it. isza,y very easy matter to change romoneobjective to another, when, as .is frequently. necessary in lecture worlr, microscopic andordinary slides are intermingled in the `series of views, which it is desired to illustrate upon the screen.

The holder vfor thecondenser lenses is supported from the intermediately located slide holder frameAbya plurality of arms a6 projecting therefrom, and is entirely free from thelantern hood F. Such condenser holder comprises two semi-cylindrical sections c c of stamped metal, the one e of "which is thus supported :from said arms a6, while the other c is pivotally attached to the first section at e2, so as to be adapted to be swung upwardly into the position illustrated in` Fig. 2. When thus tilted upwardly, the two lenses c3 composing the condenser may `be readily removed from the spaced encircling grooves e4 of the holder sections, whereby they are engaged when such hinged section c is drawn down onto the other by the catch c5 provided forithis purpose.

As just indicated, the condenser is support'edentirely separate from the lantern hood or body, but it is necessary, in order to prevent-diffusion of light from the lamp, that a more or less light-proof closure extend from such lampto the condenser. The

' space shown as intervening between the condenser andthe slide holder does not present this dilliculty, for the reason that the light as it leaves the condenser is obviously concentrated into a single sharply delined beam, no light escaping laterally. The lantern body F accordingly, will require to more or less overlap the condenser holder, depending upon the adjustment of the lamp H longitudinally of the base of the apparatus, such lamp being carried by a vertical frame A slidably secured to such base. It is on the same :frame A4 that I support the lantern hood, which although overlapping the condenser is not allowed to Contact therewith. Such hood, I furthermore, construct of louver work, by forming it out of a series of fiatemetal rings f, which although mounted in spaced relation to each other upon the rods f that extend forwardly from the frame A4 to support the same, are oi such cross-sections as to overlap and thus prevent the escape of light from within. rlhe air, however, may freely circulate therethrough, as will be obvious; while, owing to the thinness and niunber of the rings f, the heat from the lamp and its supporting A'trame Af is rapidly radiated, so rapidly, indeed, as to leave the lantern cool enough for packing almost immediately after shutting o'lll the current from the lamp. By this construction of lantern hood, the dilliculty oi preserving the condenser lenses from cracking, where a source of light involving such an intense heat as that of the arc is employed, is almost entirely overcome.

Certain Jfeatures of construction in connection with the support of the lamp H will next be noted. For this purpose the vertically extending frame A4 that carries the lantern hood is provided with a rearwardly extending portion at al at its lower edge (see Figs. 5 and G), wherein is mounted a tubular supporting member 71,. In such member is rotatably mounted a split sleeve L, in whichA latter in turn is rotatably held the pin or stud 7a2 that constitutes the supporting element of the lamp proper. The axis of such stud, however, is eccentric with respect to that of tubular member L, so that rotation of the latter, which may be eilected by means of a handle 71,3 provided for this purpose, serves to shift the axis of the lamp to one side or the other. This, it is appreciated is a very slight adjustment, and will only be necessary for more refined work, for as fully explained in the patent above referred to, the construction of my improved arc lamp is such as to do away with the necessity of making any coarser adjustment of the lamp in this respect. Similarly for the securing of a refined vertical adjustment of the lamp, a nut 7b4 is threaded upon the lower end of tubular supporting member t, which nut is adapted to support the stud h2 of the lamp at various elevations, as will be readily understood. Finally, to

secure the lamp in desired adjusted position, a set screw h5 is provided that by compressing the sleeve It serves simultaneously to hold the latter and said lamp against rotation.

0f the detailed structure of the lamp, it need me:el v be noted in the present connection that the latter comprises in addition to such supporting element or stud ft2, two arms its secured to said stud and extending radially with respect to the axis ofthe latter, and twov carbon holders hl, one movably mounted along each of said arms by means of adjusting screws carried thereby. In my former construction of the lamp l made such holders of two clamp members mounted so as to be movable transversely of the corresponding arm, and provided an adjusting screw with oppositely threaded portions for drawing said members together upon the carbon. By this construction it is obvious the carbon is supported centrally over and in alinement with the corresponding arm. ln place of such construction of holder, l now propose to utilize a chuck LS, (the construction of which is shown in detail in the sectional view of F ig. 9), wherein, by rotating a knurled nut hg a split clamping sleeve 701 is forced in upon the carbon H, and the same result thus more conveniently secured. Such clamping sleeve is so formed as to grip the carbon at points longitudinally spaced a sullicient distance apart to insure steadiness and the desired parallelism.

To prevent radiation of heat and, particularly, light from the lamp in undesired directions, a casing, of course, requires to be provided so as to suitably inclose the same. F or this purpose, I mount an open semi-cylindrical casing K directly upon the lamp, so as t0 be oscillatory therewith. Closure of the space between such casing and the rear portion of the lantern hood F is obtained by means of extensions la hinged to the respective sides of the casing. Guide pins It are disposed on the supporting portion a7 adjacent to the hinged portions of the casing, 70,' upon rotation of the casing these pins will prevent the outward movement of the hinged portions and will tend to maintain them in contact with the hood. The upper end of the casing is closed by a cover 7a2 of the form illustrated in the several figures of the drawings, such cover being pivotally attached to the rear end of the lantern hood. A ventilator opening 7c3 is provided in the upper portion of such cover, and, in addition, a centrally disposed aperture c* of small diameter; a plate of ground mica [v5 is provided above the aperture it* so that the image of the arc formed by the lamp will be thrown thereon and may be there observed, provides a very convenient and provided for adjusting the lamp, l dispose a mirror as below the same upon the horizontally projecting portion a7 that supports the lamp and appurtenant parts. rlhe reliection of the arc in such mirror can be observed from a considerable distance and by a suitable index, the accuracy with which such arc is centered can be easily determined.

lt is not thought necessary to further describe the mode of operation of the lantern, since the operation of the several parts composing the sam-e has been set forth incidentally to the description of the structure of the latter. Such apparatus, it will be observed, provides a very convenient and imple lantern, that while shown in form primarily designed for lecture use, is equally adapted for service in any or" the numerous connections in which projecting apparatus is employed. Aside from the convenience with which the various adjustments about the apparatus may be made, particular emphasis is placed upon the construction orA the lantern hood wherebv the very serious annoyance and expense arising from the breaking of condenser lenses, owing to the excessive heating oi' the latter, is in large degree eliminated.

In conclusion, it should be remarked that most of the foregoing features are equally useful irrespective of the character of the illuminant employed; in other words it is not intended to imply that they are limited in their application to use either with the particular arc-lamp shown, or with an arclamp at all, but the calcium or any other suitable lamp may be utilized.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means be employed.

l therefore particularly point out and distinctly claim as my invention l. ln apparatus of the class described, the combination with the lantern body; of an arc lamp mounted at the rear end of said body and adapted to oscillate about a substantially vertical axis; an inclosing casing for said lamp borne thereby and oscillatory therewith; pivotal extensions to the walls of said casing; and means adapted to cooperate with said extensions to tend to maintain the same in contact with said lantern body irrespective of the position of said casing.

2. In apparatus of the class described, the combination with the lantern body, oi an arc lamp mounted at the rear end of said body and adapted to oscillate about a substantially vertical axis; an inclosing casing for said lamp borne thereby and oscillatory therewith; extensions hinged to the walls of said casing, one on each side, and guide pins disposed on the outer sides of said extensions and tending lto retain the latter close against said lantern body irrespective of the position of said casing.

l3. In apparatus of the class described, the combination with the lantern body, of an arc lamp mounted at the rear end of said body and adapted to oscillate'about a substantially vertical axis; an inclosing),` casing for said lamp borne thereby and oscillatory therewith; pivoted extensions to the Walls of said casing, means tending to retain said extensions against said lantern body irrespective of thevposition of said casing, and a hood pivoted to said lantern body and adapted to cover the upper end of said casing and its extensions.

4f. In apparatus of the class described, the combination with the lantern body, of an arc lamp mounted at the rear end of said body and adapted to oscilla-te about a substantially vertical axis, an open semi-cylindrical casing borne by said lamp and later ally inclosing the same, extensions hinged to the respective lateral edges of said casing, guide pins disposed on the outer sides of said extensions and tending to retain the latter close against said lantern body irrespective of theV position of said casing, and a cover mounted on said lantern bodyabout a transverse axis and adapted to cover the upper end of said vcasing and its-extensions.

5. In apparatus of the class described, the combination With'the lantern body, of an arc llamp mountedat the rear end of said body and adapted to oscillate about a substantially vertical axis, an open semi-cylindrical casing borne by said lamp and laterally inclosing the same; extensions hinged to the respective lateral edges of said casing, guide pins disposed on the outer edges of said extensions, said casing having projections adapted to contact said extensions; said pins and said projections tending to retain the latter close against said lantern body irrespective of the position of said casing, and a cover pivotally attached to said lantern body about a transverse axis and adapted to cover the upper end of said casing and its extensions.

6. In apparatus of' the class described, the combination with an arc lamp, of a tubular support, a split sleeve rotatable in said support, the bore in said sleeve being eccentric of the latters axis, a member extending Within said sleeve and supporting said lamp, a nut threaded upon the lower end of said support and engaging said member, and a set screw adapted to hold said sleeve against rotation and compress the same upon said member.

Signed by me this 12th day of June, 1909.

HERBERT F. PATTON.

Attested by- ANNA L. GILL, JNO T. OBERLIN.

Copies of this patent-may beobtained for five-cents each, by addressing the Commissioner of Patents Washington, D. C. 

